$ git clone -n https://src.fedoraproject.org/rpms/fop.git /var/lib/mock/f41-build-side-1-2908390-34740/root/chroot_tmpdir/scmroot/fop
Cloning into '/var/lib/mock/f41-build-side-1-2908390-34740/root/chroot_tmpdir/scmroot/fop'...
$ git fetch origin 82cb28429726cfc7588a94de45c2c54d55679537:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fop
 * [new ref]         82cb28429726cfc7588a94de45c2c54d55679537 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 82cb284 Fop ver. 2.10